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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb84c80e8bac1a2f1d76272fe88c871a061964bbfb2153e60d531d3d65022301' 
  AND token = '/S8Axo/5WefKvmzcOf3iKzzu1Z/ja0H+KMIez2u7A4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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