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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60bfbca8364688847c597e502276dd85bb537d7f71cb870220a550a8985858e1' 
  AND token = 'fwX4j0TrXadPomgw8FGBrIIK2UYq0gRjxaXns4xi2oA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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