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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f0160443d593e6b2624da5031bcab5ed088129bbd071323984d7a9399122b04' 
  AND token = '2fSCJ7A0CrQGDZk7W2DXbAS6iAdl1xRpn72FZhKPap4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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