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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9019e571d882289be7a5dde7ab6b462a33be10215f85d84feb59d4d8c581ea98' 
  AND token = 'mascxm3U3DTwvudiHb1hXqcEhqt+Dm4Edq2L7NB52oU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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