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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01ecae32ac78ed79118b9441d2bb59935d1c2638f04e7bc96b755e15b282667b' 
  AND token = '6opJDd32RonVOZHIL7JjDmFXt6sD7blTGAQXNV/la8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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