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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02f43a54b1df1e47d7f0baf7147c7b2132c3fa0fab9cf5520fa7d3d57e606765' 
  AND token = 'K0J5X22vvgC/xNKWUAzIh3WtOB4XA4p7TDOR3ZQJwIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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