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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '160493ad6b98ac77114b2d6d3f6747709ef276ed35f0914b9eb450e4b816a41b' 
  AND token = 'YugLq5GCtoAaLsaUc7TW7n8JYlqDdC4/gjtxzt3LDp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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