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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ae38f716fa988892333f793b044841044591a4317e11f50b16b30250e07d5c9' 
  AND token = 'hbEL6yQNu3E9l6KWUwW1+8+/lsp6mi77o5a6nUaNXe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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