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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f483c8c70ed55417fe850744452449236a7c1b685a6c2a158c580ae29b0561c3' 
  AND token = 'ol8v5eE3rNxfUwQ6ztIGlqrHn8hn1k8iFBQ67dGK8/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}