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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e13d547657b48ddccf8bd25ef170fa453c8d55cd6a92f3f860477e81fbe7b55a' 
  AND token = '1a7PofYKP23bBPDjKV1eLL9VJGC2Vdlfw3djlMharjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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