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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b220c36d8eb3be616169499cad405e095d30b3e4b3dba0cc584704656fb9e38' 
  AND token = '5Kf0DfLcY/+p0uI9WN74/EC1i8u4pCqlPsiJHJh1Ovc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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