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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90d232beddbe03842ba48e331467b8c6b4f4d85c5d8efd4cf9a66faa1e2cdd90' 
  AND token = 'Q/IhZSzq6/uHiIx2FvmclpCbg3WW2zmOoF08Ps5uLAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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