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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f32794b011d0c8d2e9ab198629c2f93a2878fe351de10006ce5416b7fe223aa6' 
  AND token = 'Rp+BKfImua98a4+FdzFQNDYodtlhNNTpCIagAxtMyvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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