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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '189abbe7f98f31427ec9382cb32ce6f2536e9fc211c01dcd425b425cb1965c98' 
  AND token = 'Y+h5ckLkk0xi3Q8p0jcLeWEcbjf7C9Sb1Gwx1f9Qlx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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