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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe05148340a563c2efc23acbb3b544356ede997d1842ab572527a07ce5d5bd31' 
  AND token = '/vADhoFEDdbeao5z9GUduVGDu584CNeLC6vBi42QmBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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