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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eda176bf08777086a69e0d488fd794362ba2bfe846a337228ec8215089998fe1' 
  AND token = 'aARpFXLOyizZDQ0B/bR6KNMlVt8GiDeS8j6Awhpbjb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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