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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1532d01457bc63a5e9b0743af7dfe6395e661293dc980c73a754178b1bec46ac' 
  AND token = 'k+nEH2uah8mxvl6f4WEK5/Y5psspK6XpHWZE9O/Imj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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