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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27eb613774b047726fd79a3c1c7185e4e302ec3efd5f1d097e5235591e772505' 
  AND token = 'Q6RcqjOilhmd3n7n0iMjiMyAzCdTiwAJ3g5hDr02kTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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