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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09a88c6ba3c305736c11696ef349d7a0eb89b1108611c1803d7e72d45df5b38d' 
  AND token = 'asPAFMP0JIc7KFwBLjB1TtJOEyvzNKbNAI3CFcGuscA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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