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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '529c14288c0779d65224ded1b9ad00ee0a93f515066aa2047f6d170b875391b0' 
  AND token = 's2BeqYPcujo0s9xwsjNKvN4neqrcwsfR7j7AvGfL2xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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