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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fc236d32a9ad5b43756bf5b6227973081231c36ed88de04b6f2baaeb7820fa2' 
  AND token = 'R+J9rtcdH/EYXKPdV+Ax4tXkQOIX1EuFvWfzBIkRbiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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