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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3483e0b9bc3ff1324efbb45ae18761ed2b92aabbd9e7ed59d0323a685762e56e' 
  AND token = 'OZwupIvf1ROrO2kjuYtcIhhaRf/k7iNx6YHtP3Dkw5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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