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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ebfb9f3ab36d4aef71c6bb97ace7e7c79ca5b7efed4ac6d8d57d756e36a1588' 
  AND token = 'ZojqQtp2CpkxYG+kDqnVkxBAMXwnWqWqR62XqiZnzc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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