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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e069a7b3ded7a1fbf2fa27a5167e789dbf8a63e39bc8e754b1080d6bcae8558e' 
  AND token = 'Sr69P5GP/u5CL9KXWsjJtCqvH1OO/W40R92usd8DxSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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