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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1d26d0055f9180ebef4d08c1c9d335ee3ad0705a71753aff9b97e6f202db37a' 
  AND token = 'lzhrpKOSrqb/gO0dyrCDoy1VYstTVSO7NWed23Q6YlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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