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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05d1c45e57b2d6cad45f09ac70e58dc35689a84790b9e13b4345d2d6cb678432' 
  AND token = 'drocENpSRYPJYpDvmrA8sv4Mo6bp0jNAfRlA6Pe7oG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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