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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0912babb1bcced45fe582fa04f4851ad41a67d8a362dacba5ac06433ac003592' 
  AND token = 'p1/byxaQbIQv/QVaoD3dtirkVOyh8eulNR3w/BhWvlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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