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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0362b2039520df2ba229c95e4c8294a69072c56403ddb74aa6ce4662b160b47e' 
  AND token = 'E8yJ++Fc/fXnE8v2KDM5kTOFNGQz0mzdOBvKRUI9ElQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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