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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ae1435e7d0f00fd87cde9b2047b735960ab37f4291de4d588d5cbb1d64eb7d5' 
  AND token = 'F7+ohSls/sC4XxwV0Kg9Dwcr53shWyg3LD5A2n0/ftc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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