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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '489015e07ab4170d61f7185afca0cb0f007081fec5f39d3df25645d5f5dc513d' 
  AND token = 'Z6/G77s85GOuXjtMlH/8mkD9p6+spKUKfxR3h/WU4do=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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