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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b60c0ec7e6be24afa811da03018618b83d7d6dd27a0fa98f7c82e1c674882232' 
  AND token = 'C+9vGBsqNW0d/bdU5woBdP9LES5z+vEEq6XJOCkexhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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