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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e381b26ef0204ac115b4e705cc128c7330eb47b862d608245597ede5a7f09e7' 
  AND token = '7eT+IemwDCGlKpDBHDcLVjzeiW3yowe+t3gWl54+l1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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