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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b5c2e13523c67ee72f5db9703bb7df00dc3d0d5d18eb4c1aed967ab3ffab1047' 
  AND token = '3/AJeOe+1FQCDQBOrxdcRV4D6Fv6Wy8Xrw8E5Ffm5iY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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