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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48f15e5586fdcd7d522c259331b73c080cdd95c438945bbb1927b3beaee50d02' 
  AND token = '4urg5bVOM6V6NLLDyxnq2dHEhD0Kh2plE72kqqeOlDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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