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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1a005c8b07acd0fd95722fc1a8853e7bdfb7bc149cd57b85b0265b3801dc1d12' 
  AND token = 'IAUNkX60UQm9yCIOJj1aZ+dXTZ+UH5zv2N2BBGA8LFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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