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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '070c0d7d86d234eac865548333c7b86486b4da0036a0c45065dd7a0b303233ee' 
  AND token = '7UIwNm25HB6QwoKfM7/9n0ljV4iZO3/Bn7Dmsf+lExQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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