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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e04b10401ab6151041e2979369c22b88ea94a4e7a0c9745821f0f64f4f8e81b' 
  AND token = 'uk1nhZ1G2dJ04coZyj2DQqzAGmNgcni2Lt3sNsPpxw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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