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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'badfe8f3d69794646d2ab631913057ebeb06bdac7662a82738fe1619254e902a' 
  AND token = '/iiIqc6pcHLxEOoUAqghf89nbskyId4vAZcZI0Gg4IE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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