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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d3c1814826ee0113fbe65edb812e61fbca8b0f981b423d872d2c4920c7d982a' 
  AND token = 'OsjG7wtPtne5n1redGY2p56vu17YeMYa2dOAoU6CbhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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