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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '566520d4384b03e0d49652767f0790fd2b1047347731cd71fed228aaa0c6ec78' 
  AND token = 'f3jI+XdiKgM2AwL2H+mHahu3syJILUEJkUV9vVESCEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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