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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caeecae567749ff96403ee4b3e70e4740e6b9bc921bb3a7d17ef3e9e4fa7997e' 
  AND token = 'YTo9jUl/tWXUwaMlY2otZk7Ls8IK0QmRAnjDaoRQ+1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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