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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a2ea1aac8147990e91f445b673b7b948b0b2dcbd55c88813cd56914ea4ae7ab' 
  AND token = 'BHXDA7SI1n6SAj7t9+wu5RMa7mPdIfBaDy5kf7VRs+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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