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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a89fa0b3830c31e0cd26b57789e2a317e0b97c875c6e6261718722c62bddc3e1' 
  AND token = 'y4pHcLKFyO2OWg4vOc+qhwFU3AdZb4A6hXGSYs7V828=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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