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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09295797b3c735bf920a5dc8437860f90efb676003ae9a4e160cf32b8a1dfcef' 
  AND token = 'X2i3PuzO3I1gRiqcwGOqQB3j7dq2tweOd15e6hM3zdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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