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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f24f4fa07ede3a62badb222505213b3a282f55d4c92022e145fa28e32758591b' 
  AND token = 'qyrdp8stFQeYZAZlIpFnPiGmUnww25ZTymWDFoIr2Tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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