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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da1e564eaeabd1b34dba2b44531c07bdbaf0308ecad2ed2284461a493423a27b' 
  AND token = 'hJL2U5Z6OsqwLTpooj7yEG/Dz5ou548s3Ssy9CHKIqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}