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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb5565ad266f15bac701bfbf56da98c72616b92619b33395deeefdba2614b841' 
  AND token = 'SE9IQ7CtXu75fLQjzPAQ10Vj0sc99VokSMXE7Fpvp74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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