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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d1ddd74cc65a16eaa05aa945b0b65b521e9ababa8cab3fe9eafa4d4952874fe' 
  AND token = 'anOo77Lox7MYPDVDGLMjCFMPWlsH1kqBqGjf+TO+aCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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