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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0580f14f65148b2d9791c5be35e35cca1f7aaef61006cd2b293c1f97b5b12bbf' 
  AND token = 'cqenDB8ChP9AYClT3yI5348ma1amlApV+O7IcP6Bakg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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